The slope-intercept equation for a line is y = mx + b where m is the slope and b is the y-intercept of the line. From the graph, you can see that the y-intercept (the y-value from the point where the line crosses the y-axis) is 4. The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -2) and (2, 10) so the slope becomes:

Plugging these values into the slope-intercept equation:

y = 3x + 4

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(7a)(2ab) + (5a²)(3b)
(7 x 2)(a x a x b) + (5 x 3)(a² x b)
(14)(a¹⁺¹ x b) + (15)(a²b)
14a²b + 15a²b
29a²b

To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.

When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

9a⁸ + 4a⁸ = 13a⁸